Well, never mind the chances of it sticking for just a minute. You may get lucky.
You have pointed out something I have told the folks at kennedyspacecenter.com to stop doing. First, let me say, that that website is not NASA's website. It is the website of the company that runs the tours and visitors center.
Yes, they do put 12 noon for everything they don't know the time of, which I have informed them is the wrong thing to do. Obviously they should just put TBD. My gut feeling says it is a marketing thing to get people to come that day.
BUT, coincidentally in this case, it does so happen that the STS-123 shuttle mission currently slated for Feb. 14 is around noon EST. No, it won't be noon exactly, but by the time all is set and done it will be on a precise minute and second that falls roughly between 11am and 1pm. The orbit of the international space station determines the time the shuttle launches to it, and the orbit fluctuates a little as time progresses. As of a couple of months ago, next Feb. 14 showed right around 12:00 EST for that specific day. And, to note, the launch time changes every day, getting approx. 23 to 25 minutes earlier each subsequent day.
This is the website you should bookmark to follow launch dates:
http://www.spaceflightnow.com/tracking
And then, to point out, this is the official NASA site (but, it only lists NASA launches not all of them; thus the first site is better):
http://www.nasa.gov/missions/highlights/schedule.html
I hope you get to see one; if not that one, then I hope a launch currently slated prior to that slips to the time you'll be there
Good luck. You can get viewing information on my website:
http://www.launchphotography.com/Launch_Viewing_Information.html